03-04-2009
compare two text files in a good format
I am writting a script where I have to Campare two text files.
I have 3 text files named by s_list, s_list_new and dmg_file. where I have to compare s_list and s_list_new and whatever the unique values are in s_list I have to add that in the dmg_file. And the values they are only in s_list_new and not in s_list I have to delete that from dmg_file
I have tried so many things, but diff, comm is not helping me because if i do comm it compares line by line and the value may not match line by line and with diff its not giving me exact output and I am thinking may be im not aware of different diff output formats.
for example if i do diff temp temp1 i get like this output and I dont want it. i just want thos unique values nothing else
diff temp temp1
1,5d0
< a
< 1
< 2
< 3
< 4
11c6,9
<
---
> 10
> 11
> 12
> 13
Any Help Plz
I will appreciate the help
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DIFF3(1) User Commands DIFF3(1)
NAME
diff3 - compare three files line by line
SYNOPSIS
diff3 [OPTION]... MYFILE OLDFILE YOURFILE
DESCRIPTION
Compare three files line by line.
-e --ed
Output unmerged changes from OLDFILE to YOURFILE into MYFILE.
-E --show-overlap
Output unmerged changes, bracketing conflicts.
-A --show-all
Output all changes, bracketing conflicts.
-x --overlap-only
Output overlapping changes.
-X Output overlapping changes, bracketing them.
-3 --easy-only
Output unmerged nonoverlapping changes.
-m --merge
Output merged file instead of ed script (default -A).
-L LABEL --label=LABEL
Use LABEL instead of file name.
-i Append `w' and `q' commands to ed scripts.
-a --text
Treat all files as text.
-T --initial-tab
Make tabs line up by prepending a tab.
--diff-program=PROGRAM
Use PROGRAM to compare files.
-v --version
Output version info.
--help Output this help.
If a FILE is `-', read standard input.
AUTHOR
Written by Randy Smith.
REPORTING BUGS
Report bugs to <bug-gnu-utils@gnu.org>.
COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc.
This program comes with NO WARRANTY, to the extent permitted by law. You may redistribute copies of this program under the terms of the
GNU General Public License. For more information about these matters, see the file named COPYING.
SEE ALSO
The full documentation for diff3 is maintained as a Texinfo manual. If the info and diff3 programs are properly installed at your site,
the command
info diff
should give you access to the complete manual.
diffutils 2.8.1 April 2002 DIFF3(1)